diff options
| author | Sean Christopherson <seanjc@google.com> | 2022-04-29 01:04:14 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-06-20 06:21:34 -0400 |
| commit | 284dc49307738d2a897fd375431f741213cd0f27 (patch) | |
| tree | c14a6f346361baf8bb16cba6c50f36da3b3bc4b1 /virt | |
| parent | b1624f99aa8fedafcabf1b92fa51ed88dde14acb (diff) | |
| download | linux-284dc49307738d2a897fd375431f741213cd0f27.tar.gz | |
KVM: Take a 'struct page', not a pfn in kvm_is_zone_device_page()
Operate on a 'struct page' instead of a pfn when checking if a page is a ZONE_DEVICE page, and rename the helper accordingly. Generally speaking, KVM doesn't actually care about ZONE_DEVICE memory, i.e. shouldn't do anything special for ZONE_DEVICE memory. Rather, KVM wants to treat ZONE_DEVICE memory like regular memory, and the need to identify ZONE_DEVICE memory only arises as an exception to PG_reserved pages. In other words, KVM should only ever check for ZONE_DEVICE memory after KVM has already verified that there is a struct page associated with the pfn. No functional change intended. Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20220429010416.2788472-9-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/kvm_main.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 7cd0e3d67f9f..aa1bcd5f140d 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -168,7 +168,7 @@ __weak void kvm_arch_guest_memory_reclaimed(struct kvm *kvm) { } -bool kvm_is_zone_device_pfn(kvm_pfn_t pfn) +bool kvm_is_zone_device_page(struct page *page) { /* * The metadata used by is_zone_device_page() to determine whether or @@ -176,10 +176,10 @@ bool kvm_is_zone_device_pfn(kvm_pfn_t pfn) * the device has been pinned, e.g. by get_user_pages(). WARN if the * page_count() is zero to help detect bad usage of this helper. */ - if (!pfn_valid(pfn) || WARN_ON_ONCE(!page_count(pfn_to_page(pfn)))) + if (WARN_ON_ONCE(!page_count(page))) return false; - return is_zone_device_page(pfn_to_page(pfn)); + return is_zone_device_page(page); } bool kvm_is_reserved_pfn(kvm_pfn_t pfn) @@ -192,7 +192,7 @@ bool kvm_is_reserved_pfn(kvm_pfn_t pfn) if (pfn_valid(pfn)) return PageReserved(pfn_to_page(pfn)) && !is_zero_pfn(pfn) && - !kvm_is_zone_device_pfn(pfn); + !kvm_is_zone_device_page(pfn_to_page(pfn)); return true; } |